Side note, just spent some solid time looking over skullcrusher's hasbro photo some more. There seem to be actual physical differences beyond simple paint scheme.
1. Look at the flying squirrel arms.
2. Check out the pixaliated pointer arms on the Mandrill and vice versa
3. Maaayyybbee the leapin lizard's head/frill seems a little elongated. Hard to tell near edge